Stone-dressing machine.



T. GALLAGHER.

STONE DRESSING MACHINE.

APPLICATION FILED- FEB. 27, 1902. N0 MODEL.

' 17F Z 226K NIH IIHI IHIII I ll' llllll PATENTED JUNE 16, 1903.

r lhvirnn Sin-Ins Patented June 16, 1903.

Parent twice.

THOMAS GALLAGHER, OF FAL CONER, NEW YORK.

SPEGIFIGATIOEN forming part of Letters Patent No. 731,297, dated J'une16, 1903.

' Application filed February 27,1902. Serial No. 95,998. (No model.)

To (all whom, it may concern.-

Be it known that I, THOMAS GALLAGHER, a citizen of the United States,and a resident of the town of Falconer, in the county of Chautauqua andState of New York, have invented a new and useful Stone-DressingMachine, of which the following is a specifica tion.

My invention relates to machines for grinding or abrading stone; and theobjects of my improvement are, first, to provide a machine whereby thesurface of a glass-bevelefs stone shall be kept perfectly true ordressed, and,

second, to provide means whereby the stone may be dressed at any desiredangle.

At present it is customary for glass-bevel ers to frequently stop anddress their stones by hand on account of the hard glass hol-- lowing outthe surface of the stones, making them untrue. My dressing-machinekeepsthe stone always dressed, and thus much more and better work can bedone; ltcdoes not cut away the stone as fast as the hand method ofdressing. 1 attain these ends by mechanism as illustrated in theaccompanying drawings, in which- Figure 1 is a plan view. of my machine.Fig. 2 is a side elevation of machine. Fig. 3 is a side elevation ofcross-bar with guiderails attached. Fig. 4 is a sectional view at line Xin Fig. 1.

Similar numerals refer to the several views.

1 is the grinding or abrading stone, which is supported in a framecomposed of the two main uprights 2 2 and the lesser ones 3 3, which areheld together by the lower crosssimilar parts in bars 4 4. The upperadjustable cross-bars 5 6 also assist in giving the required rigidity tothe frame and sustain the guide-rails 9 9. Bars 5 and 6 are madeadjust-able in slots 2 and 3 by set or thumb screws 7 and 8, sumcientplay or room being allowed for such adjustmentw Rails 9 have tongues 10on their inner sides to fit grooves 12 in carriage 11 in its reciprocalmotion.

Within an openingin the center of carriage 11 block 13 is adjustablysecured by set or thumb screw 14 and the segments 15, 15 on each sideblock 13. The bearing of segments 15 011 carriage 11 at each end of theopening are curved to receive the curved side of the segment 15. (SeeFig. 4..) Set-screw 14 bears againstthe segment,and thus in combinationwith adjustable bars 5 and 6 holds block 13 at I any desired angle.Carriage 11 is given a reciprocal motionby arm 16 and crank-wheel17 onshaft 18. 'Stone 1 is mounted on shaft 19 and turned by pulley 20 onsaid shaft. The upper side of the stone 1 is made at an .angle 21, thebetter to cut the bevel on the glass 22. Bars 5 and 6 are made wide ateach end to give larger bearing for the set-screws and are madeadjustable to give any desired angle to the upper grinding-surface ofstone 1. It will be recognized that with stone 1 revolving at about twohundred revolutions per minute and block 13 given a moderate reciprocalmovement at the angle of incline the grinding-surface will be keptperfectly true at the desired angle. For block 13 I prefer an emery orcarborundum block, though other abrasive materials might be used.

To adjust bars 5 and 6 and the guide-rails and carriage for block 13,the block is adjusted withits lowersurface parallel to the guiderailsand firmly clampedv in positionf The cross-bars 5 and 6 are then freedby unscrewing screws 7 and 8 and the whole frame dropped down untilblock 13 rests on stone 1 on the angle 21, which would give the framethe desired angle. Other forms of wedges or clamping-pieces might beused in place of segments 15 and not depart from my invention; but thepurpose ofsegments 15 isto accomplish slight adjustments of block 13 tostone 1 without readjusting the whole frame and the four set-screws 7and 8. The block is adjusted for slight inaccuracies by dropping theblockonto the stone and'turningu set-screw 14:, thus adjusting andholding the block accurately in position at the same time. The loweredges 23 of segments 15 are out even with the lower side of carriage 11,so that block 13 may be worn away nearly to carriage 11 and almostentirely used up.

I claim as new- In'a stone-dressing machine, the combination of a framecomposed of two pairs of uprights having slotted tops and suitableconnections, a glass-bevelers abrading-stone revolubly mounted in saidframe, the uprights of one of said pairs placed on opposite sides ofsaid stone, cross-bars adjustably mounted too in the slotted tops ofsaid pairs of uprights, In testimony whereof I have signed myguide-rails secured on said cross-bars, a carname to this specificationin the presence of w riage slidably mounted on said guide-rails, twosubscribing witnesses.

an arm and crank-wheel to give a recipro- 5 cating motion to saidcarriage, and an abra- THOMAS GALLAGHER sive block adjustably mounted insaid car- Witnesses: riage, substantially as and for the purpose S. A.BALDWIN, specified. GEO. H. BENSON.

